1.优化上传空白表后，后端代码会报错

api/api_v1/endpoints/data_mana.py

@@ -100,6 +100,8 @@ async def add_select_map(
     """添加属性值选择映射"""
     dfs = pd.read_excel(file, engine='openpyxl', sheet_name=None)
     for attr_name, df in dfs.items():
+        #将id这列转换成字符串类型
+        if len(df) >0:
             df['id'] = df['id'].astype(str)
             map_ = df.to_dict('records')
             data_in = schemas.SelectMap(game=game, attr_name=attr_name, map_=map_)